Abstract
Permanent-magnet synchronous generator (PMSG) associated to power electronic is a complex object to control due to the existence of a nonlinearly coupled variables, and time-varying parameters. In This paper a new passivity-based control (PBC) is applied to a conversion system with variable speed wind based PMSG connected to the grid via a pulse width modulation (PWM) buck-to-buck converter and DC-Link is presented. This technique is based on the energy of the system and injects a damping term which ensures the fast convergence and the stability of the measured signals towards their references which forces the PMSG to operate at an optimal torque and track time-varying speed of the wind turbine to extract the maximum power produced. A classical proportional integral (PI) controllers is used in the grid-side, where the DC-Link voltage is regulated and only the active power is transferred to the distribution network. The obtained simulation results under MATLAB/Simulink, addresses the high-performance regulation, fast response of the control strategy.
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